| 摘要 |
PURPOSE:To keep the effective temperature of an occupant constant in the environment requiring frequent switching of cooling and heating by starting the distribution of a refrigerant to a heat exchanger outside a car room and a blast in response to the prescribed temperature difference between the estimated value and target value of the blowout temperature when the heating operation state is changed to the cooling operation state. CONSTITUTION:A three-way valve 32 distributing a refrigerant from a compressor 31 to a heat exchanger 38 outside a car room and a heat exchanger 33 in the car room for radiation is controlled by a control device 43 based on the heat environmental information together with a cooling fan 30, the compressor 31, and a blower motor 44. The control device 43 calculates the target value and estimated value of the blowout temperature based on the heat environmental information, adjusts the blast quantity of the cooling fan 30 in response to the difference of them, starts the distribution of the refrigerant with an aperture setting means when the estimated value becomes higher than the target value and the absolute value of the difference becomes the first set value in changing the heating operation to the cooling operation, and starts a blast when the absolute value of the difference becomes the second set value higher than the first set value. The blowout temperature can be lowered to the target value without stopping the compressor 31 under the environmental condition requiring frequent switching of cooling and heating. |
